1. Hexadecimal
Sweet Sixteen!

2. Hexadecimal
Decimal
Hex 1 2 3 4 5 6 7 8 9 A 10 B 11 C 12 D 13 E 14 F 15
Hexadecimal or “base 16” or “hex” is a number system that consists of 16 digits.
We typically use the digits 0-9 to represent zero to nine and A, B, C, D, E, F (or a, b, c, d, e, f) to represent ten to fifteen.

3. Hexadecimal
Hexadecimal is used widely by computer system designers and programmers. E.g.
Colour codes
#000000, #FF0000, #FFFFFF, #BC784E
IPv6 address
2001:0db8:85a3:0000:0000:8a2e:0370:7334
URLs
where %20 (decimal 32) is the space character.
Globally unique identifiers
{3F2504E0-4F89-41D3-9A0C-0305E82C3301}

4. Hex to Decimal Hexadecimal 16s 1s Working Decimal 06 0 x16 626 0E 32 B5

5. Decimal to Hex 18 1 2 12 44 C 2C 7 25 13 Decimal 16s 1s Working
Hexadecimal 18 1 2
18 / 16= 1 (with 2 left over) 12 44 C
44 / 16 = 2 (with 12 left over – 12 is C) 2C 7 25 13

6. Hex to Binary Hexadecimal 16s 1s Working Binary 06 0 x16 6 1A
1 x16
A (10) 0E 32

7. Binary to Hex Binary 16s 1s Working Hexadecimal 0000 0110 (0000 0000)
( ) 6
( )  - 06 1
( ) 12
( ) 1C

8. RGB Colour System 256 possible levels for each of Red, Green, Blue.
In decimal, these are 0 (lowest) to 255 (highest).
In binary, these are to
In hex, these are 00 to FF.
For example
Red is #FF0000 (255, 0, 0)
Green is #00FF00 (0, 255, 0)
Yellow is #FFFF00 (255, 255, 0)
Images: